The mass of a proton is mpm_\text{p}mp, the mass of a neutron is mnm_\text{n}mn, and the mass of a helium-3 (23He^{3}_{2}\text{He}23He) nucleus is MMM. The speed of light in a vacuum is ccc.
Which expression is correct for the binding energy (B.E.) of the helium-3 nucleus?
B.E.=(mp+2mn−M)×c2\text{B.E.} = (m_\text{p} + 2m_\text{n} - M) \times c^2B.E.=(mp+2mn−M)×c2
B.E.=(2mp+mn−M)×c2\text{B.E.} = (2m_\text{p} + m_\text{n} - M) \times c^2B.E.=(2mp+mn−M)×c2
B.E.=(2mp+2mn−M)×c2\text{B.E.} = (2m_\text{p} + 2m_\text{n} - M) \times c^2B.E.=(2mp+2mn−M)×c2
B.E.=M×c2\text{B.E.} = M \times c^2B.E.=M×c2
